Exclusive! Will Smith's Greatest Fear: Mice

In his blockbuster movies, he seems to be fearless, but what's the one thing Will Smith said terrifies him? Mice.

"I'm brave for my kids and strong, but if there's a mouse, Jada gotta deal with it," he joked. "Rats are okay, or a possum – but a mouse, ahh! Even now I'm getting nervous thinking about it."

Ellen asked, "Have you ever held a mouse?" -- leading him to look over his shoulder, expecting a scare.

"I'm good with snakes," he explained. "Willow has a boa constrictor… but mice? Whew!"

Looks like we know how to scare Will next time he's here!

In other news – Will's son Jaden explained he is not trying to emancipate himself from the Smith home. "The thing that people don't get is everything at his house is free, so I can get anything and everything I want at his house," he joked. "So I think I'm gonna be there for 20 or 30 more years!"

So where'd the rumor come from?

"I think I made a joke in Tokyo [at a press conference]," said Will. "My baby boy, he's never leaving me, ever!"